反序列化然后序列化時保留XmlXsdschemaLocation

我將 Xml 檔案反序列化為 .NET 類，修改屬性，然后序列化回同一個檔案。這是 .NET 模型 (vb.net)

<XmlRoot("StationSetpoints")>
Public Class XmlStationSetpoints
    <XmlElement("Setpoint")>
    Public Property Setpoints As List(Of XmlStationSetpointsSetpoint)
End Class

<Serializable>
Public Class XmlStationSetpointsSetpoint
    <XmlElement("Point")>
    Public Property Points As List(Of XmlStationSetpointsSetpointPoint)
    ' etc...
End Class

反序列化和序列化 (c#)

var settings = New XmlStationSetpoints();
var serializer = New XmlSerializer(XmlStationSetpoints);
// deserialize
using StreamReader sr = new StreamReader(path)
    settings = (XmlStationSetpoints)serializer.Deserialize(sr);
// serialize
using StreamWriter sw = new StreamWriter(path, false)
    serializer.Serialize(sw, settings);

原始 Xml 檔案，包括位于 Xml 檔案旁邊的我的本地架構檔案xsi:schemaLocation="http://www.w3schools.com StationSetpoints.xsd"（第 5 行）

<?xml version="1.0" encoding="utf-8"?>
<StationSetpoints
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xsi:schemaLocation="http://www.w3schools.com StationSetpoints.xsd">
  <Setpoint PartNumber="108022">
    <Point InstrumentName="PD Stage" Value="10"/>
  </Setpoint>
  <Setpoint PartNumber="107983">
    <Point Order="2" InstrumentName="PD Stage" Value="7.5"/>
  </Setpoint>
</StationSetpoints>

當檔案被序列化時，不包括該架構路徑

<?xml version="1.0" encoding="utf-8"?>
<StationSetpoints 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <Setpoint PartNumber="108022">
    <Point Order="0" InstrumentName="PD Stage" Value="10"></Point>
  </Setpoint>
  <Setpoint PartNumber="107983">
    <Point Order="2" InstrumentName="PD Stage" Value="7.5"></Point>
  </Setpoint>
</StationSetpoints>

如何在 .NET 類中保留該架構路徑，以便序列化檔案包含它？

uj5u.com熱心網友回復：

你可以反序列化和重新序列的xsi:schemaLocation加入明確的財產為目的的屬性，如在此答案由DTB向XmlSerialization和XSI：SCHEMALOCATION（XSD.EXE） ，適當轉換到VB.NET：

Public Partial Class XmlStationSetpoints
    <XmlAttribute("schemaLocation", Namespace:="http://www.w3.org/2001/XMLSchema-instance")>
    Public Property xsiSchemaLocation As String = "http://www.w3schools.com StationSetpoints.xsd"
End Class

演示小提琴 #1在這里。

如果您想對的值進行硬編碼xsi:schemaLocation并使其在序列化時無條件地出現，您可以使用顯式實作的屬性來實作，如下所示：

Public Partial Class XmlStationSetpoints
    <XmlAttribute("schemaLocation", Namespace:="http://www.w3.org/2001/XMLSchema-instance")>
    Public Property xsiSchemaLocation() As String
        Get
            Return "http://www.w3schools.com StationSetpoints.xsd"
        End Get
        Set
            ' Do nothing, it's hardcoded.  A setter is required because XmlSerializer will only serialize properties with public getters and setters.
        End Set
    End Property
End Class

演示小提琴 #2在這里。

如果你想硬編碼的值xsi:schemaLocation但控制它是否出現（因為例如它應該只出現在XmlStationSetpointsXML 檔案的根元素時），你可以使用這樣的xsiSchemaLocationSpecified屬性：

Public Partial Class XmlStationSetpoints
    <XmlAttribute("schemaLocation", Namespace:="http://www.w3.org/2001/XMLSchema-instance")>
    Public Property xsiSchemaLocation() As String
        Get
            Return "http://www.w3schools.com StationSetpoints.xsd"
        End Get
        Set
            ' Do nothing, it's hardcoded.  A setter is required because XmlSerializer will only serialize properties with public getters and setters.
        End Set
    End Property
    <XmlIgnore>
    Public Property xsiSchemaLocationSpecified() As Boolean
End Class

該屬性將捕獲xsi:schemaLocation在反序列化程序中是否遇到該屬性，并將控制在序列化程序中是否發出該屬性。

演示小提琴 #3在這里。

標籤：C＃ xml 网络 xml序列化

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